4week summer training report on D.L.W. Varanasi by Somesh Dwivedi. on the topics 1.-Heavy Weld Shop(HWS) 2.- Heavy Machine Shop(HMS) 3. Light Machine Shop(LMS) 4. Truck Machine Shop(TMS)

1. A VOCATIONAL TRAINING REPORT
ON
IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR
THE DEGREE OF BACHELOR OF TECHNLOGY
TO
DEPARTMENT OF MECHANICAL ENGINEERING
NARAINA COLLEGE OF ENGINNERING & TECHNOLOGY
KANPUR (COLLEGE CODE-287)
(APPROVED BY AICTE & AFFILIATED TO UTTAR PRADESH
TECHNICAL UNIVERSITY LUCKNOW)
SUBMITTED TO; SUBMITTED BY;
MR. MANEESH MISHRA SOMESH DWIVEDI
Mr. SURVIND KUMAR B.TECH 4TH YEAR
MECH. ENGG.
R.NO.-1128740095

2. ACKNOWLEDGEMENT
This Project Report is combined effort of many people who have contributed in
their own ways in making this report effective and purposeful. In my report, I would like to
take the opportunity of thanking all those who have been instrumental in preparing this
report.
Firstly, I would like to thank Prof. Keshav Kant, Director N.C.E.T Kanpur, for
giving me an Opportunity to carry out this Project.
I would sincerely like to thank the employees and the officers of DLW, Varanasi
for their help and support during the vocational training. Despite their busy schedule, they
took out time for us & explained to us the various aspects of the working of the plant, from
the production shops.
I would sincerely like to thank Mr. Shiv kumar (JE/H.W.S.) Mr.V.K.
Shukla(SSE/H.M.S.) and Mr. Sunil Kumar(JE/L.M.S.), Mr.A.K.Mandal(JE/T.M.S.
) who was instrumental in arranging the vocational training at DLW Varanasi, and
without whose help and guidance the training could not have materialized.
I express my deep sense of gratitude to Mr. R. R. Jha (Principal, TTC) for
given me such a great opportunity.
I expressed my thanks to the lecture Mr. Maneesh Mishra & HOD of department,
Mr. Chandra Kant for extending his support.
I would also thank my institution & my faculty members without whom this report
would have been a distant reality.
I also extend my heartfelt thanks to my family & well wishers.
Somesh dwivedi
M.E. (4th year)
1128740095

3. Preface
The objectives of the practical training are to learn something about industries
practically and to be familiar with the working style of a technical person to adjust simply
according to the industrial environment.
It is rightly said practical life is far away from theoretical one. We learn in class
room can give the practical exposure or real life experience no doubt they help in improving
the personality of the student in long run of life and will be able to implement the theoretical
knowledge. As a part of academic syllabus of four year degree course in Mechanical
Engineering, every student is required to undergo a practical training.
I am student of the Final Year Mechanical Engineering & this report is written on
the basis of practical knowledge of acquired by me during the period of practical training
taken at Diesel Locomotive Works, Varanasi.
This report is presented in very simple & understanding language on the basis of
Primary and Secondary data.
Somesh Dwivedi
M.E. (4th Year)
1128740095

4. DECLARATION
I Somesh Dwivedi, Roll No-1128740095, student of B.Tech.(Mech.
Engg.) 4th year of Naraina College OF Engineering & Technology, Kanpur hereby declare
that my project report on “ DIESEL LOCOMOTIVE WORKS ” is an original and
authenticated word done by me.
I further declare that it has not been submitted elsewhere by any person in
any of the institutes for the degree of bachelor’s of technology.
SOMESH DWIVEDI
M.E.(4th year)
1128740095

5. TABLES OF CONTENTS
1. Acknowledgement
2. Preface
3. Declaration
4. Introduction of D. L W.
5. Identification of locomotives
6. Product
6.1 EMD Specification
6.2 ALCO Specification
7. Vision & Mission
8. Line Diagram of Diesel Locomotive
9. Heavy Weld Shop
10. Heavy Machine Shop
11. Light Machine Shop
12. Heavy Truck Shop
13. Finding & Conclusion
14. Learning Experience

6. INTRODUCTION
Background
Diesel Locomotive Works (DLW) is production unit under the ministry
of railways. This was setup in collaboration with American locomotive company (ALCO)
USA in 1961 and the first locomotive was rolled out in 1964. This unit produces diesel
electronic locomotives and DG sets for Indian railways and other customers in India and
Abroad.
Subsequently a contract for transfer of technology of 4000 HP Microprocessor Controlled
AC/AC Freight (GT 46 MAC) / passenger (GT 46 PAC) locomotives and family of 710
engines has been signed with electro motive division of general motors of USA for
manufacture in DLW. The production of these locomotives has now started and thus DLW
is the only manufacturers of Diesel Electric Locomotives with both ALCO and General
motors technologies in the world.
Brief History
 Set up in 1961 as a green-field project in technical collaboration with ALCO/USA to
Manufacture Diesel Electric Locomotives. 

 First locomotive rolled out and dedicated to nation in January,1964. 

Transfer-of-Technology agreement signed with General Motors/ USA in October,95 to
manufacture state-of-the-art high traction AC-AC diesel locomotive

7. 
 A flagship company of Indian Railways offering complete range of flanking
products in its area of operation. 

 State-of-the art Design and Manufacturing facility to manufacture more than 150
locomotives per annum with wide range of related products viz. components and
sub-assemblies. 

 Unbeatable trail-blazing track record in providing cost-effective, eco-friendly and
reliable solutions to ever-increasing transportation needs for over three decades. 

 Fully geared to meet specific transportation needs by putting Price-Value-
Technology equation perfectly right. 

 A large base of delighted customers among many countries viz. Sri Lanka, Malaysia,
Vietnam, Bangladesh, Tanzania to name a few, bearing testimony to product
leadership in its category. 

8. SALIENT FEATURES:
Annual production capacity 125 Locomotives
Annual turn-over (Rs) 5000 million
Total number of staff 7223
Workshop land 89 Hectares
Township area 211 Hectares
Covered area in shops 86300 Sq.m
Covered area of other service buildings 73700 Sq.m
Electrical power requirement 3468 KVA
(Average maximum demand)
Electrical energy consumption (units/year) 19.8 million
Standby power generation capacity 3000 KW

9. IDENTIFICATION OF LOCOMOTIVES AT DLW
Following types of diesel loco are being produced in the DLW:-
1. WDM- Wide Diesel Mixed
2. WDP- Wide Diesel Passenger
3. WDG- Wide Diesel Goods
4. WDS- Wide Diesel Shutter
The First Letter (Gauge)
1. W- Indian broad gauge(The “W” stand for wide Gauge-5ft)
2. Y- Meter gauge(The “Y” stands for Yard gauge-3ft )
3. Z- Narrow gauge(2ft 6 inch)
4. N- Narrow gauge (2ft)
The Second Letter (Motive Power)
1. D- Diesel
2. C -DC Electric(can run under DC traction only)
3. A- AC Electric(can run under AC traction only)
4. CA- Both DC & AC (can run under both AC & DC tractions)
5. B- Battery Electric locomotive (rare)
The Third Letter (Job Type)
1. G- Goods
2. P- Passenger
3. M- Mixed, both goods & passenger
4. S- Shunting(also known as switching engines)
5. U- Electric multiple units (used as commuters in city suburbs)
6. R-Rail cars

10. Ex- “WDM3A”
“W”-broad gauge
“D”- diesel motive
“M”- suitable for mixed services
“3A”- the locomotive power is 3100HP
Or “WAP5”
“W”- broad gauge
“A”- Ac electric traction motive power
“P”- suitable for passenger
“5”- denote that this locomotive is chronologically the 5th electric locomotive model
used by the railway for passenger.

11. Products
 EMD(Electro Motive
Division)
1. WDG-4000 HP GOODS LOCOMOTIVE
Broad Gauge freight traffic Co
Co-Co diesel electric locomotive with 16
Cylinder 4000 HP, AC-AC transmission,
braking with high traction high speed cast steel trucks.
First turned out in 1999 with transfer of technology from General Motor
(USA), this locomotive has exceptional fuel efficiency and very low mainten
requirements. It is specifically designed for heavy haul freight traffic requirements
of Indian Railways for the 21st Century.
The heart of loco Traction Control Converter uses the GTO devices
(obsolete technology). Now the IGBT devices, ha
It is the latest technology and will be cost effective and gives higher reliability
The locomotive power has been upgraded to 4500 BCV and the first Loco
(Loco No 12114) was manufactured in
microprocessor controlled propulsion and
has been introduced from Oct 2006.
May 07.
led maintenance
s reliability.

12. General Characteristic
 Installed Power
 Axle Load
 Gauge
 Wheel arrangement
 Wheel diameter
 Height
 Width
 Overall Length (Over Buffer
Beam)
 Weight
 Max tractive effort
 Maximum speed
 Fuel tank capacity
 Locomotive Control
 4000 HP
 21 T
 1676 mm
 Co-Co
 1092 mm
 4201 mm
 3127 mm
 19964 mm
 126 T
 54 T
 100 Kmph
 6000 lts
 EM 2000 with SIBAS-16 Traction
Control
WDG4-4000 HP GOODS
LOCOMOTIVE
TRACTIVE EFFORT & POWER CHART

13. 2. WDP4-4000 HP PASSENGER LOCMOTIVE
State-of-Art, Microprocessor controlled AC-AC, Passenger Locomotive Powered
with 16-710G3B 4000HP Turbo charged Two stroke Engine.
Fabricated rigid design Under frame, two stage suspension, High Traction High
Speed 3 axle (HTSC) light weight cast truck frame attribute to high adhesion performance.
First turned out in 2003, this locomotive has exceptional fuel efficiency and very low
maintenance requirements. It is specifically designed for heavy haul passenger traffic
requirements for Indian Railways
The WDP4 fleet is being upgraded by provision of hotel load feature along with
power up gradation to 4500 HP. The prototype will be manufactured in the year 2007.
Diesel Engine Transmission
 16 Cylinder 710 G3B, 2 stroke,
turbocharged after cooled
 Fuel Efficient Engine
 Injection System Direct Unit
Injector
 Governor Woodward
 Compression Ratio- 16:1
 Lube Oil Sump Capacity 1073 Lts
 Electrical AC-AC
 4 Traction motor ( 3 in parallel per
bogie)
 Suspension Axle hung / taper
roller bearing
 Gear Ratio 77:17

14. Truck Brakes
 High adhesion HTSC ( High
Tensile Steel Cast) truck or bogie
 Adhesion 0.42
 Electronic Air Brake System (
KNORR-NYAB-Computer Controlled
Braking)
 Air , hand , dynamic brake with fully
blended with automatic brakes
 Pure air brake
General Characteristic
 Installed Power
 Axle Load
 Gauge
 Wheel arrangement
 Wheel diameter
 Height
 Width
 Overall Length (Over
Buffer Beam)
 Weight
 Max tractive effort
 Maximum speed
 Fuel tank capacity
 Locomotive Control
 4000 HP
 19.5 T
 1676 mm
 A-A-I I-A-A
 1092 mm
 4201mm
 3127 mm
 19964 mm
 117 T
 27 T
 160 Kmph
 4000 lts
 EM 2000 with SIBAS-16 Traction Control

15.  ALCO(AMERICAN LOCOMOTIVE COMPANY)
1. 1350 HP CAPE GAUGE LOCOMOTIVE VDM 4
TECHNICAL INFORMATION
1350 HP Locomotive having fabricated cape gauge Co-Co bogie. These
locomotives have been supplied to Angola and Sudan.
Wheel Arrangement
Co - Co
Track Gauge
1067 mm Cape gauge
Weight
72 t
Overall Length
15600 mm
Wheel Diameter
921 mm
Gear Ratio
18: 93
Maximum Speed
90 Kmph
Diesel Engine Type : ALCO 251 D 6 Cyl.
1350
Transmission
Electrical AC/DC
Brake
28LAV-1 system
Loco
Air, dynamic, parking
Train
Air & Vacuum
Fuel Tank Capacity
3000 Litres

16. 2. 2300 HP CAPE GAUGE LOCOMOTIVE
TECHNICAL INFORMATION
2300 HP Main Line Locomotive, having fabricated cape gauge Co-Co bogies.
These are provided with two driver’s cabs, one at each end. These locomotives have been
supplied to Angola and Sudan.
Wheel Arrangement Co-Co
Track Gauge 1067 mm Cape Gauge
Weight 102 t
Overall Length 17620 mm
Wheel Diameter 921 mm
Gear Ratio 18 : 93
Maximum Speed 100 Kmph
Diesel Engine Type: ALCO 251-B 12 Cyl. V- Engine
HP 2300
Transmission Electrical AC/DC
Brake IRAB-1
Loco Air, Dynamic, parking
Train Air
Fuel Tank Capacity 3000 Litres

17. 3. 2300HP METER GAUGE LOCOMOTIVE
TECHNICAL INFORMATION
2300 HP Main Line Locomotive, having fabricated meter gauge Co-Co
bogies. These are provided with two drivers cabs, one at each end. These locos have been
supplied to Malaysia, Senegal and Mali.
Wheel Arrangement Co-Co
Track Gauge 1000 mm Meter Gauge
Weight 102 t
Overall Length 17620 mm
Wheel Diameter 921 mm
Gear Ratio 18 : 93
Maximum Speed 100 Kmph
Diesel Engine Type: ALCO 251-B 12 Cyl. V- Engine
HP 2300
Transmission Electrical AC/DC
Brake IRAB-1
Loco Air, Dynamic, parking
Train Air
Fuel Tank Capacity 3000 Liters

18. 4. BROAD GAUGE MAIN LINE FREIGHT LOCOMOTIVE
WDG 3A
TECHNICAL INFORMATION
Diesel Electric main line, heavy duty goods service locomotive, with 16 cylinder
ALCO engine and AC/DC traction with micro processor controls.
Wheel Arrangement Co-Co
Track Gauge 1676 mm
Weight 123 t
Length over Buffers 19132 mm
Wheel Diameter 1092 mm
Gear Ratio 18 : 74
Min radius of Curvature 117 m
Maximum Speed 105 Kmph
Diesel Engine Type : 251 B,16 Cyl.- V
HP 3100
Brake IRAB-1
Loco Air, Dynamic
Train Air
Fuel Tank Capacity 6000 liters

19. VISION & MISSION
Vision & Mission
Our Vision -”To be a world class manufacturer of Diesel - electric locomotives."
Our Mission - "We shall achieve our vision through Continuous Improvement in the
areas of Product Quality, Research and Development, Supplier Partnership, Human Resource
Development and Team Work with emphasis on Core Competence leading to Customer
Satisfaction and Business Excellence."

20. LINE DIAGRAM OF DIESEL LOCMOTIVE
Main Alternator:-
The diesel engine drives the main alternator which provides the power to move the
train . The alternator generates AC
motors mounted on the trucks (bogie). In older locomotives, the alter
machine, called a generator. It produced direct current which was used to provide
DC traction motors. Many of them machines are still in regular use. The next development
was the replacement of the generator by the alternator but s
.The AC output is rectified is give the DC required for the motors.
Auxiliary Alternator:-
electricity which is used to provide power for
the traction
alternator nator was a DC
power for
still till using DC traction motors
Locomotive used to operate passenger trains are equipped with an auxiliary alternator.
This provides AC power for lightening,
train .The output is transmitted along the train through an auxiliary power line.
heating, air conditioning, dining facilities etc on the

21. MOTOR BLOWER
The diesel engine also
drives a motor blower. As its name suggests , The
motor blower provides the air which is blown over the traction motors to keep them cool
during periods of heavy work. The blower is mounted inside the locomotive body but the
motors are on the trucks, , so the blower output is connected to each of the motors through
flexible ducting.
The blower output also cools the alternators. Some designs have separate
blowers for the group of motors on each truck and others for the alt
arrangement , a modern locomotive has a complex air management system which monitors
the temperature of the various rotating machines in the locomotive and adjust the flow of air
accordingliy
AIR INTAKE.
alternators. ernators. Whatever the
The air for cooling , the locomotives motors is drawn in from outside the
locomotive . It has to be filtered to remove dust
and other impurities and its flow regulated
by temperature , both sides and of the locomotive. The air temperature tempera
ture system has to take
account of the wide range of temperatures from the possible +40°C of summer and to the
possible -40°C of winter.
ELECTRONIC CONTROLE
Almost every part of the modern locomotive equipment has some of electro
electronic
control. These are usually collected in a control cubicle near the cab for easy access.

22. Cab :
The standard configuration of US- designed locomotive is to have a cab at one end of
the locomotive only.
Batteries
Just like automobile , the diesel engine needs a battery to start it and to provide
electrical power for the lights and controls when the engine is switched off and the alternator
is not running.
Traction motor
Since the diesel- locomotive uses electric transmission , traction motors are provided
on the axles to give the final drive .These motors were traditionally DC but the development
of the modern power and control electronics has led to the introduction of 3Φ AC motors.

23. PINION/GEAR ;-
The traction motor drives the axles through a reduction gear of a range
between 3 to1 (frieght) and 4 to 1 (passenger)
Fuel tank;-
A diesel locomotive has to carry its own fuel around with it and there has
to be enough for a reasonable length of trip. The fuel tank is normally under the loco frame
and will have a capacity of say 1000 imperial gallons .the new AC 6000s have 5500 gallon
tanks .In addition to fuel , the locomotive will carry around , typically about 300US gallon of
colling water and 250 gallon of lubrication oil for the diesel engine.

24. Air compressor :-
The air compressor is required to provide a constant supply of compressed air for the
locomotive and train brakes.
Drive shaft;-
The main output from the diesel engine is transmitted by the drive shaft to the
alternators at one end and the radiator fans and compressor at the other end.
Gear box :-
The radiator and its cooling fan are often located in the roof of the locomotive .
Drive to the fan is therefore through a gearbox to change the direction of the drive upwards.
Turbo charger;-
The amount of the power abtained from a cylinder in a diesel engine depends
on how much fuel can be burn it in. the amount of fuel which can be burnt depends on the
amount of air available in the cylinder .
So turbocharger is used to increase the amount of air pushed into each cylinder .
The turbocharger is driven by exhaust gas from the engine . This gas drives a fan which in
turn , drives a small compressor which pushes the additional air into the cylinder. The
turbocharging gives a 50% increase in engine power.

25. Sand box:_
Locomotives always carry sand to assist adhesion in bad rail conditions.
Truck frame :-
This is part (called the bogie in the UK) carrying the wheels and traction motors of the
locomotive.
MECHANICAL TRANSMISSION:-
As the name suggests, a mechanical transmission on a diesel locomotive consists a
direct link between the diesel engine and the wheels. In the example given below , the diesel
engine is in the 350-500HP range and the transmission is similar to that of an automobile
with a four speed gearbox.

26. STARTING :-
A diesel engine is started(like an automobile) by turning over the crankshaft
until the crankshaft until the cylinders fire or begin combustion .The starting can be done
electrically or pneumatically .Pneumatic starting was used for some engines. Compressed air
was pumped into the cylinders of the engine,untill it gain sufficient speed to allow the
ignition , than fuel was applied to fire the engine. The compressed air was supplied from a
small auxiliary engine or by high pressure air cylinders carried by the locomotive. Electric
starting is now standard . It works same way as for an automobile,with batteries providing
the power to turn a start motor which turns over the main engine. In older locomotives fitted
with DC generators instead of AC alternators, the generator was used as a starter motor by
applying battery power to it.
Governer:-
Once a diesel engine is running , engine speed is monitored and controlled
through a governor . Governer ensures that the engine speed stays high enough to idle at
right speed and that the engine speed will not raised to high when full power is demanded.
The governer is simple mechanical device which first appeared on steam engines . It operate
on the diesel engine as shown in the diagram below -

27. Cooling:-
Like an automobile engine , the diesel engine need to works at an optimum
temperature for best efficiency .when it starts , it is too cold , and when working ,it must not
to be allowed to get too hot.To keep the temperature stable , a cooling system is provided
.this consist of a water based coolant circulating around the engine block, the coolant being
kept cool by passing it through a radiator.
Another reason for keeping diesel engines running is that the constant heating
and cooling caused by produce leaks.
Lubrication:-
Like an automobile engine , a diesel engine needs lubrication. In an arrangement
similar to the engine cooling system,lubrication oil is distributed around the engine to the
cylinder ,crankshaft and other moving parts .The radiator is sometimes design as a heat
exchanger ,where the oil passes through pipes encased in a water tank which is connected to
the engine cooling system .
The oil has to be filtered to remove impurities and it has to monitored for low
pressure if oil pressure falls to a level which could cause the engine to size up ,a “low oil
pressure switch” will shut down the engine .There is also a high pressure relief valve ,to
drain off excess oil back to the sump.
Transmissions:-
Like an automobile, a diesel locomotive cannot start itself directly from a
stand. It will not develop maximum power at idling speed, so it needs some form of
transmission system to multiply torque when starting. It will also be necessary to vary the
power applied according to the train weight or the line gradient. There are three methods of
doing this: mechanical, hydraulic or electric . Most diesel locomotive use electric
transmission and are called “diesel-electric” locomotive . Mechanical and hydraulic
transmission are still used but are more common on multiple unit trains or lighter
locomotives.

28. HEAVY WELD SHOP
This shop mainly deals with the fabrication of the engine block and base
(B.G. & M.G.) Turbo support. After cooler housing items. The engine block is the
principal, structural member of the diesel engine. It is composite weldment with heavy
plates thickness varying from 16 mm to 75 mm and steel forgives conforming to
specification is 2062.
The spine being the most highly stressed item as we can say spine of the
cylinder block is made out of one piece bitted 5 x 7 thickness confirming to is
1895. The billet foundation plate and cylinder walls are built around the steel
forging saddles to form the air chambers which ensure the maximum rigidity for
successful fabrication of cylinder block special attention is paid to the following
aspects cylinder block special attention is paid to the following aspects.
1. Inspection standard
2. Proper materials
3. Proper electrodes and flux
4. proper welding technique
5. welfare of staff

29. SEQUENE OF FABRICATION OF ENGINE BLOCK
1. Set up of saddles foundation plates and spine on special fixture and weld saddles spine
founded on rails.
2. Set up welding of out side cylinder wall.
3. Set up of middle dock (Tack welded) with respect to target.
4. Remove can bearing shim from saddle face.
5. Intermediate machining operation remark in middle deck and chamber at top of spline.
6. Set up of inside wall and deck welded with spline.
7. Lay out of plane height.
8. Intermediate machining operation
Machine height of out side wall and inside wall with respect to
marking and camber.
9. Set up of top deck (Both side) and lifter block (G.E. side only) for filament of eye bolt
and tack weld.
10. All in side (8x2 Beal welds) welding in done by sub are method.
11. Back gauging of saddle to foundation rail joint.
12. Lay out for bearing.
13. Set up for cam bearing with respect to pay out Si No.12.
14. Welding of the cam bearing and saddle with foundation rail bottom side (back gauge
portion)
15. Set up of cam bearing rids and weld.
16. Say out for 8 machining.
17. Intermediate machining operation.
18. Flame cut counter of foundation plate to give relief clearance to free
movement of counter with respect to crank shaft.
19. Set up of the side sheets and sub arc weld of side sheets and top deck.
20. Set up of full control compartment sheet and weld.
21. Intermediate machining operation mills both and to lay out for end plates considering
total length and machining allowance.

30. 22. Hydrostatic test of water compartment.
23. Set up of top end plates and weld.
24. Set up of top deck center and weld.
25. Stress relieving weldment.
26. Kerosene oil test for control shaft compartment.
27. Shot plast.
28. Final debarring.
Note: Saddle out side and inside walls foundation rail are x ray joints.
ELECTRODE:-
Saddle, spline and foundation plates are sledded on a rotary fixture E 6020
electrodes 6.3 mm and 5 mm of M/s A Par Pvt. Ltd. Bombay and celorex of M/s Advani
or Liken capable of giving X-Ray quality joints are being used for the welding.
The coating is such that a stage containing iron oxide, manganese oxide and
silicon is usually produced other constituents containing the oxides of aluminum
manganese of sodium are prevent to modify the slag ferromanganese in the main de-oxygen
and sodium silicate is used as the binder. In most cases core wire is of remounted
steel.
FLUX: -
D.L.W. auto melt gr I flux of advance linken (P) LTD. Bombay In used. The flux in a
mixture of power of deter mined practical size and each particle in chemically basic in
character these particles are not fused. the flux in heated period to use in on over at
250 c for O2 hours as moisture flux generated the hydrogen in the arc and cause cold
cracks in the weld deposit and in the heat effected zero.

31. WIRE:-
Wire used in the sub are welding is the auto melt gr. A cold copper Coated size 5m.m.
with low carbon content confirming to IS 2879 Manufactured by M/S Advani lincon
P. ltd. Bombay. The chemical composition of the wire in carbon 0.08% m.m. 0.46%
P.0.018% S0.022%.
STRESS RELIVE OF CYLINDER BLOCK.
After completion of welding the cylinder block in then stress relieved at the
temp. Ranging from 115 F obtating total timing 28 Hrs ie.
(1) Pre heat time 14 Hours.
(2) Soaking time 04 Hrs and
(3) Cooling time 10 Hrs in stress relative‘s furnace capable to accommodate to
B.G. block at a time. As the engine block in machined to very close tolerances.
It is necessary that all stresses developed during the fabrication stages are
completely relieved before machining. This would ensure a longer life in
service without any distortion which would normally result on account of very
alternating stresses that the engine block is subjected to during its service.
KEROSINE OIL TEST:-
Check that there should not be any leakage at the bottom side of the fuel control
compartment welding joint after powering kerosene oil. The engine block is then shat blasted
at pneumatic compressed air a pressure of 75ibs/sgu.inch.

32. DEBURING:-
It is to be ensured that the completes (welding) weldment is free of any spatter
welding defects and sharp corrosion of important welded joint have been ground then the
cylinder block is marked and handed over for machining operation to H.M.S.
SEQUENCE OF FABRICATION ASSEMBLY:-
Setting of saddles on the fixtures as per drawing with the foundation plat L.S. &
R.S. and one spine on the top of the saddle. Tacked and welded all these with each other
burn run of the saddle with spline, clean and grind the opening of the spline, then set and
face the out side and inside walls L.S. & R.S. both sides of the saddle burn run off and clean
grind of the wall opening
After that setting up the middle deck weld from bed bottom side of deck and lifter
block weld 16 beets all welding as quality. Saddle to foundation plate, saddle to spline and
saddle to out side wall welding is check as joints.
Arc wilding done machine on the cylinder block where the welding by machine is
called submerged are welding. Copper coated mild steel class II were with flux is used.
After x-ray welding test, the assembly is sent for lay our of cam bearings in marking section.
The cambering are set up tack and weld with the cam ribs and water compartment plates.
After that again x-ray text of bottom plates is
done. Then burn opening and Skelton grinding operation is done. Then send this block
assembly in the machine section for 8 machining of side sheet. Set and weld the side sheets
on the 8 machining. Weld fuel self compartment on the positioned welding machine. Weld
side sheet foundation rails. Side sheet to cam ribs. Out side wall of full self compartment.
After that the block assembly is again sent to M/C section. For end milling to maintain the
length of the block as per marking and size. Then hydraulic water test is done at 75 P.S.I.

33. At last set up the end plates (gen and free end) both side of the block assembly, tack
and then setup the top deck centre in the centre of the block and weld it by sub are welding
M/C
After complete fabrication the block is sent to H.T.S. sec. for stress reliving to 700 c then
shot blasting the block and sent the machine section for final machining.
Main base fabrication
The following components are required for the assly of main base.
1. Side sheet L.S. and R.H.
2. Pipe assembly with plates
3. Engine mount free end and gen end CH/RH
4. Rib (engine mount free end & gen.end)
5. Top rail
6. Bottom. Plate (Gen end, free end & centre)
7. Plug L.O. drain.
8. Cross web G.A. 1,2,3,4,5,6,7,8, & 9
9. Cross web auxiliary assembly
10. End plate free end & gen end
11. Oil drain compartment.
12. Pad
13. Brass engine mount free end.
14. Brass engine mount gen end.
15. L.O. suction pipe (sub. Assembly)

34. WELDING PROCESS:-
(1) Out side bottom plate, top plate, centre plate to side plate both sides an rest
welding is down from bottom is top in sequence numbest for inside welding
bottom pt, top plate and rest, from bantam is tip is done.
(2) In this operation the support is clamped on positioned with top plate and all the
rest wadding is completed.
HEAVY MACHINE SHOP:-
This shop carries out the machining of Cyl. BLOCK (M.G. & B.G.) main base,
saddler Main bearing caps, Splines, Turbo Super Charger, Lube Oil, Fuel Oil & Water
header) com bearing housing.
OPERATION:-
Planning, Milling, Drilling, Tapping, Boring Honing, Serration milling etc.
Types of Machine provided in the shop are :-
Double Housing planned machine (32”, 24’, & 16’).
Radial drilling machine.
Radial drilling machine Traveling type. Boring
Machine
Angular Boring Machine (Excello) Tracer
Planner machine.
Hill Acme koing structural milling machine.

35. Main dimension of cyl. Block:-
1.Did of com bore = 4.750” to 4.7515”
(B.G. & M.G.)
2.Did of blank bore = 9.0355” to 9.0370”
(M.G. & B.G.)
3.Did of liner bore = 10.750” to 10.752” (Upper)
(B.G. of M.G.)
= 10.621” to 10.623 (Lower)
4.Did of thirst Collar = 10 ”
5. Thickness of thrust bearing = 4.247” to 4.249”
6. Thickness of the plate = free end = ”
= gen. End = 1 ”
7. Radial distance between the centers of crank of Cam bore = 10.499” to 19.501”
8. Distance of liner seat from center of crank
Bore = 32.480” to 32.485”
9. Total length of the M.G. black = 106.370”
= 106.380”
10. Total length of main Bush B.G. = 172.380”
B.G. = 172.370”
11. Total length of main Bush M.G. = 117.130”
= 117.120”
12. Total length of B.G. Black = 161.625”
= 161.630”

36. LIGHT MACHINE SHOP
This shop deals with the matching of various small components required for the
power pack unit such as, cam shaft, connecting rod, liners, gears levers, F.P. Support, Piston
pin, nuts and bolts bushes, various shafts etc.
The light machine shop divided into the following section:-
1. Econometric section
2. Grinding section
3. Gear section
4. Cam shaft section
5. A.T.L. section
6. Belching section
7. Connecting rod section
8. Lathe section
9. Liners section
10. Drilling section
11.Milling section
Connecting rod section:-
In this section the connecting rod is made. All the machining operations of the
connecting rod. Completed here with the help of various types of machine. The connecting
rod has two parts, one is cap and other is rod. The material of the connecting rod is steep
forging. In B.G. 16 per loco and in M.G. 6

37. Main dimensions
1. crank bore (big bore) =6-411 to 6.421
2. piston pin bore (small bore)=3.998 to 3.999
3. Distance Between Two = 20.995 to 21.000 bare centre
4. Rod Thickness = 3.020 to 3.022
5. Weight = 32 Kg 950 gram to 32 Kg gram.
6. Pressure Torque = 150 P.S.I.

38. TRUCK MACHINE SHOP:-
In this shop followings are assembles-
1. Wheel and Axle assembly.
2. Traction motor & Gear Case assembly.
3. Brake rigging assembly.
4. Bearing adopter assembly.
5. Final assembly.

40. FINDING AND CONCLUSION:-
After completing my project I familiarize with DLW, and I get that diesel
locomotive works is a famous technological temple, which came in existence, in 1964 by
Late Shri Lal Bahadur Shastri. DLW export to the following countries like Sri Lanka,
Bangladesh, Angola, Tanzania, Vietnam,Sengal Mozambique, Malaysia, Sudan,
Myanmar etc.
There are many facilities for the employees as hospital, health club, sports club,
school and college, sewing center, technical training center etc. In short we can say that all
the facility which the ordinary employee needed is provided by welfare department and the
entire employee are very well aware with welfare programmes. They take advantage with
programme in any form. Very few improvement but important improvement, which
mentioned above, is needed in welfare programmes, which make the employees more
satisfied.

41. Learning Experience
Working on this project was a pleasure for me as I learned lot of things which was
unknown to me before doing this project. I worked In,Heavy Weld Shop(HWS), Heavy
Machine Shop (HMS),Light Machine Shop(LMS) ,Truck Machine Shop (TMS) and my job
description includes regular updating status to know about all related to Production Unit,
Diesel Generating sets and their spares for Indian Railways and Non-Railways customer.
I tried to give my best effort on this project but it could be more better if I would
have theoretical knowledge about workshops before taking this project. As this topic was
new to me and due to time constraint I was not able to through each and every Procedure.